The metric system is the primary form of measurement. However, temperature units would not be named Kelvin, or Fahrenheit, since they were named for men from Earth, but rather by centigrade or the more benign "standard" developed in the online Visual Guides. Despite this, certain units are used that are named after scientists from Earth, including celsius, watt, joule, and hertz.

The metric system also applies to quantities as well, beyond the standard SI prefix. See Large Numbers for more details.

↑ 12.012.1These units represent the rotational and orbital period, respectively, of Coruscant; they are also known as the "standard day" and "standard year". Local days and years on different planets may vary greatly. The Galactic Standard Calendar is used to calibrate these units together.